package com.dn.designpatterns.prototype;

import java.util.Hashtable;

/**
 * @program: designpatterns
 * @description: 菜鸟
 * @author: DN
 * @create: 2021-03-28 17:36
 **/
public class ShapeCache {
    private static Hashtable<String, Shape> shapeMap = new Hashtable<String, Shape>();

    public static Shape getShape(String shapeId) {
        Shape cacheShape = shapeMap.get(shapeId);
        return (Shape) cacheShape.clone();
    }

    // 对每种形状都运行数据库查询,并创建该形状
    // shapeMap.put(shapeKey, shape);
    // 例如,我们要添加三种形状
    public static void loadCache() {
        Circle circle = new Circle();
        circle.setId("1");
        shapeMap.put(circle.getId(), circle);

        Square square = new Square();
        square.setId("2");
        shapeMap.put(square.getId(), square);

        Rectangle rectangle = new Rectangle();
        rectangle.setId("3");
        shapeMap.put(rectangle.getId(), rectangle);
    }
}
